Garbuzova KR1 Option 08

Product description

Option 8

• What is the essence of the process of modification? Give an example of use

Modifiers for improving the properties of foundry aluminum alloys.

• What is the difference between cold and hot plastic deformation? Describe

Features of both types of deformation.

• Draw a diagram of the iron-iron carbide state, indicate the structural

Components in all areas of the diagram, describe the transformations and construct a curve

Cooling (using a phase rule) for an alloy containing 5.0% C. What is the structure of this

Alloy at room temperature and how such an alloy is called?

• Carbon steel 35 and U8 after quenching and tempering have a martensite structure

Tempering and hardness: the first 45 HRC, the second - 60 HRC. Using the iron-

Iron carbide and taking into account the transformations occurring during tempering, indicate the temperature

Quenching and tempering temperature for each steel. Describe the transformations taking place in these

Steels in the quenching and tempering process, and explain why steel U8 has a greater hardness than

Steel 35.

• Steel 40 was quenched from temperatures of 760 and 840? C. Using the chart

State of iron-cementite indicate which structures are formed in each case. Explain

Reasons for the formation of different structures and recommend the optimal mode of heating for quenching

Of this steel.